Pump.



Y (No Model.)

Patented Nav. 26, 190|. .Y H. TURNER.

PUMP.

(Application led Jan. 2, 1901.)

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UNITED STATES ,PATENT FFICE.

yHENRY TURNER, OF SHEFFIELD, ENGLAND.

PUMP.

SPECIFICATION formingpart of Letters Patent No. 687,414, dated November 26, 1901.

Application filed January 2, 1901. Serial No. 41,927. (No model.)

To all whom, it may concern.-

Be it known that I, HENRY TURNER, a subject of the Queen of Great Britain and Ireland, residing at Burcott road, Sheffield, in the county of York, England, have invented Improvements in Pumps, of which the following is a specification.

My invention relates to improvements upon the pump described in my British Patent No. 23,620 of 1895 and also to a connecting device for attaching the pump delivery-hose to the object to be iniated.

The drawings hereto annexed show the invention vapplied to a hand-pump for inflating cycle-tires, (for an example,) the connecting device, and details.

Figure l is an elevation of a hand-pump; Fig. 2, an enlarged section of large piston; Fig. 3, an enlarged section of small piston. Fig. 4is a detail sectional view showing the upper ends ofthe cylinders and the means of connection and communication between them. Fig. 5 is a sectional view on line com, Fig. 1.

Two cylinders are secured together at both ends by metal caps or belts C, and a passage D, Fig. 4, is made from one to the other through :the belt C at the top end, and I may in some cases place in this passage a non-return valve to admit air from A to Band prevent its return. The cylinder B is open at the bottom end for the admission of air, the outlet E being at the bottom of cylinder A into the connecting-pipe F, on the free end of which my connecting device is secured. Each cylinder has a piston-rod G and G2, which pass through stuffing-boxes G3 and are connected with a handle I-I, common to both, by which they are operated simultaneously. Each rod has a piston. (Shown in section in Figs. 2 and 3 on an enlarged scale.) The larger piston has a cup-leather I, supported by a plate J, and will permit air to pass when it is moving downward. The smaller piston has its cup-leather reversed to permit air to pass when it moves upward. Thus when the pistons are in their normal 'position at the bottom of their strokeboth cylinders are full of air, and on drawing up 'the handle H the air in the large cylinder B is forced through the passage D into the smaller cylinder A, passing its pistou and filling the cylinder with compressed air. The return stroke will cause the small piston to force the alreadycompressed air through the outlet-pipe F into the object to be inflated, and at the same time air will pass the cup-leather Iof the large piston and fill both cylinders again.

Having now particularly described my invention and how it may be carried into practice, what I desire to claim as my invention 1s l. A portable air-pump with two attached cylinders of different size having a communicating passage at the top end; an inlet at the bottom of one cylinder, and an outlet at the bottom of the other, each cylinder provided with a piston, the rods of which are connected with one handle, the said pistons constructed to operate in opposite directions, as hereinbefore described and shown.

2. A machine-pump or air-compressor having two cylinders of different size side by side, with a passage at one end communicating with both; an inlet at the end of one cylinder, and an outlet at the corresponding end of the other; the pistons traveling simultaneously in the same direction but acting onlyr in opposite directions, as hereinbefore described and set forth.

8. A two-cylinder airpump or iniiater, both cylinders provided with pistons connected with one handle, characterized by the inlet-cylinder being of larger capacity than the outlet-cylinder, a passage of communication between the two located at the end of cylinders farthest from both inlet and outlet, substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

i HENRY TURNER.

lVitnesses:

ROBERT F. DRURY, ENsoR D. DRURY. 

